22809138 has 64 divisors (see below), whose sum is σ = 54587520. Its totient is φ = 6272000.

The previous prime is 22809119. The next prime is 22809151. The reversal of 22809138 is 83190822.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 22809099 and 22809108.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 32188 + ... + 32888.

It is an arithmetic number, because the mean of its divisors is an integer number (852930).

Almost surely, 2^22809138 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 22809138, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (27293760).

22809138 is an abundant number, since it is smaller than the sum of its proper divisors (31778382).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22809138 is a wasteful number, since it uses less digits than its factorization.

22809138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 763.

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 22809138 is about 4775.8913304220. The cubic root of 22809138 is about 283.5978653631.

The spelling of 22809138 in words is "twenty-two million, eight hundred nine thousand, one hundred thirty-eight".